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more precise edge computation, using binary search

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This commit is contained in:
Zeno Rogue 2020-05-01 11:34:17 +02:00
parent 194e314069
commit 4a57ec002a
1 changed files with 9 additions and 9 deletions
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18
rogueviz/triangle.cpp
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@ -82,15 +82,15 @@ struct trianglemaker {
hyperpoint start = point31(0, 0, 0);
double lastz;
double lasta;
double ca;
// compute how to scale this in Nil so that everything fits
for(ld a = 1e-5;; a+=1e-5) {
ld amin = 0, amax = 1;
for(int it=0; it<100; it++) {
ld a = (amin + amax) / 2;
ca = a;
hyperpoint at = start;
for(int d=0; d<3; d++) {
for(int i=0; i<isteps; i++) {
@ -100,11 +100,11 @@ struct trianglemaker {
println(hlog, "at = ", at, " for a = ", a, " sq = ", at[2] / a / a);
if(at[2] > 0) {
ld z = at[2];
ca = lerp(lasta, a, ilerp(lastz, z, 0));
break;
amax = a;
}
else {
amin = a;
}
lastz = at[2]; lasta =a;
}
// compute the shift between the cubes